table {
    border-collapse: collapse;
    margin: auto;

}

td {
    border: 1px solid #ccc;
    text-align: center;
    padding: 10px;

}

span {
    display: inline-block;
    width: 80px;
}

span:hover {
    color: #999;
    cursor: pointer;

}

#block {

    opacity: 0.95;
    display: inline-block;
    background-color: #ccc;
    position: fixed;
    left: 420px;
    top: 30%;
    display: none;
    padding: 5px;

}

#block>div {
    margin-top: 10px;
}

#btn {
    text-align: right;
}

th {
    border: 1px solid #ccc;
}